Feb 222013
Box fed, full-auto, high-capacity, high-powered assault crossbow. Out of Britain, no less.
[youtube BSjCY2kGyfI]
Note for those who might think this is more spectacular than it actually is: the flexing of the bow is converted into the kinetic energy of the bolt. The electrochemical energy in the battery is converted into the mechanical energy required to pull the bowstring back. With every step there are losses. But even at 100% efficiency, you still can’t get more total energy out of the bolts than you have in the battery to run the system. So while it’s cool – and I do indeed want one – a *gun* remains a more efficient energy storage and kinetic-energy-conversion system.